Archival and Communication of DICOM Images on a Hospital Network

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Archival and Communication of DICOM Images on a
Hospital Network

• Sheikh Mahmood H.M
• School of Biomedical Engineering
• IIT - Bombay

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• Workflow related to Images

Printing of Image on film
Radiologist
Referring Physician
Digital mages
CT, MR, US
Printing of Image on film
Radiologist
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Picture Archiving and Communication System
 
 
 
 
CT
Ultrasound
MRI
Laser Scanner
Image Database
Workstation
Workstation
Review-station
Review-station
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• Problems encountered
• Difficult to install and maintain
• Platform (and vendor) dependent
• Close system

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ACR-NEMA

• American College of Radiologists
• National Electrical Manufacturers'
  Association
• DICOM Digital Imaging and Communication in
  Medicine

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• DICOM Digital Imaging and Communication in
  Medicine
• Specifies a non-proprietary data interchange
  protocol and image format for medical images
  and image related information.
• The information is modeled with
  entity-relationship (E-R) model

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DICOM Data

• Information Object Definition (IOD) - A data
  abstraction of a class of real-world objects
• DICOM Message Service Element (DIMSE) - The set
  of DICOM Application Layer communication
  services.
• DIMSE Service Group (DSG) - A subset of the full
  DIMSE services which is applicable to a specific
  IOD
• Service Object Pair (SOP) IOD DSG

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DICOM Information Model
 
 
Service Class Specification
specifies related
SOP Class(es)
defined as
applied to an
Service Group
Information Object Definition
is a group of
contains
DIMSE Services  
Attributes
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Attribute (data element) The functional unit of
DICOM

• The Attribute includes
• A tag that identifies the element,
• Value Representation that describes how the value
  field to follow is represented
• The length field that gives the length of the
  value field that follows
• The Value field that contains the value to be
  transmitted

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DICOM Toolkit

• Imagectn Implements DICOM Image Archive
• Application Entity (Title, host, port)
• Storage
• Query
• Retrieval

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Imagectn

• Accepts SOP classes of storage service class and
• Query/Retrieve service class
• Maintains Database
• Never exits

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Storescu

• Implements SCU for storage service class
• Connects storage SCP

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Findscu

• Implements SCU for Query/Retrieve service class
• Supports querying, using C-FIND

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Movescu

• Implements SCU for Query/Retrieve service class
  (uses C-MOVE) and
• SCP for storage service class
• Configuration of storage areas

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  STA_STORE DATA LTA_STORE
BASE    
IMAGECTN   STORESCP  
SCP for FINDSCU
SCU for MOVESCU  
  MED1
ORTHO1
ORTHO2
  MED2
EMER GENCY
  OT
 
 
 
 
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Service Class User C-FIND C-MOVE C-GET
Service Class Provider C-FIND, C-MOVE,
C-GET   Service Class User C-FIND, C-MOVE,
C-GET   Service Class Provider C-STORE   Service
class User C-STORE
       
DICOM Client
Image Server  
Service Class Provider C-FIND, C-MOVE,
C-GET   Service Class Provider C-STORE
DICOM Archive        
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WWW Interface to DICOM Archive

• Using Existing PCs
• Familiarity and User Friendly
• Platform Independence

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• Display medical images on a web browser
• Load DICOM files from the Internet
• Perform various Image manipulations
• Build a user-friendly interface

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HTTP
HTTP Server
CGI
DCMTK Client
DICOM
DICOM Archive
DICOM Server
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HTTP
patientQuery
showImage
moveSeries
moveStudy
studyQuery
patientStudies
CGI
DICOM CLIENT
Output Files
DICOM
DICOM SERVER
DICOM
IMAGE ARCHIVE
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Conclusion

• DicomAccess

• Radiology Teaching Files

• Image Format Conversion

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Thank You